Twist On Wire Connector Color Yellow For Conductor Material Copper Maximum Operating Temperature 221 Degrees F Maximum Voltage 600 V Minimum Wire Combination (3) 20 AWG Maximum Wire Combination (2) 12 AWG Contact Material Steel UL 94 Flammability Rating V-2 Maximum Conductors 5 Standards CSA Certified UL Listed Wire Connector Style Standard Insulation Material Polypropylene Maximum Single Wire Size 10 AWG Minimum Single Wire Size 22 AWG Overall Height 0.55 in